Actuating device

ABSTRACT

The invention relates to an actuating device for joint action upon at least two different elements of a motor vehicle door lock, with at least one sheathed cable having a core and sheath, wherein the sheathed cable is provided in the longitudinal extent thereof with at least two force transmission units which are designed for interaction with a first element at one end and with a second element at the other end upon action on the sheathed cable, and one of the two elements is designed as an actuating lever, wherein the other element is a closing/opening element operating on a locking mechanism.

The invention relates to an actuating device for joint action upon atleast two different elements of a motor vehicle door lock, with at leastone sheathed cable having a core and a sheath, wherein the sheathedcable is provided in the longitudinal extent with at least two forcetransmission units which are designed for interaction with a firstelement at one end and with a second element at the other end uponaction on the sheathed cable and in which one of the two elements isdesigned as an actuating lever.

Actuating devices for a motor vehicle door lock usually contain a handlesuch as an internal and/or an external door handle with the aid of whichindividual elements inside the motor vehicle door lock can be actedupon, such as an internal actuating lever and/or an external actuatinglever in case of the example. The internal actuating lever and/or anexternal actuating lever are generally mechanically connected foroperation with a release lever. With the aid of the release lever, apawl is regularly released from its engagement with a rotary latch sothe rotary latch can open with the aid of a spring and releases apreviously retained locking bolt. As a result, the motor vehicle doorcontaining the respective motor vehicle door lock can be opened.

The generic prior art according to DE 10 2007 012 684 A1 discloses anactuating device of the aforementioned design, in which the generationof a tensile force at the core of the sheathed cable results in theactuating of a lock assembly. In this context and in accordance with theembodiment disclosed in FIG. 5 also two different levers can be actedupon simultaneously with the aid of the core. For this purpose, spacedapart cable fittings are connected to the core. Basically thearrangement serves to retain a sliding door of a motor vehicle in acertain (opened) position.

The further prior art disclosed in DE 43 27 782 A1 refers to a doorclosure device with a single-movement door opening mechanism. For thispurpose, the core of a sheathed cable engages with a flange and alsocontains a load bearing part.

This procedure results in an internal locking button being moved into anunlocked position. This means that when an internal opening handle or aninternal door handle is acted upon, the respective door openingactuating is executed and carried out even if the motor vehicle doorlock is still in a locked state, as the core of the sheathed cableoperates in such a way that the unlocked state is assumed and the dooris opened at the same time.

The known measures have generally proven to be successful, are howeverin parts based on a complex design. Also, additional requirements aretoday made on motor vehicle door locks, which have not been adequatelyconsidered so far. Current motor vehicle door locks do, for instance,often contain additional closing and opening means, which at present are(still) only used in luxury cars but could, in future, be used by themass market.

A closing means usually provides motorised closing of a tailgate or doorwith the aid of a conventional electric motor. As a result, the lockingmechanism of the motor vehicle door lock, i.e. generally the combinationof a pawl and rotary latch, is moved into its end position or fullyclosed position upon reaching a certain functional position, in mostcases the intermediate closed position. This results in a particularlycomfortable operation as a user only has to move the respective door ortailgate into the intermediate closed position after which the closingmeans carries out the complete closing operation. An example of such aclosing means is disclosed in utility model DE 20 2008 007310 U1 of theapplicant, in which the drive for the closing means is designed as alinear drive and acts on a lever, pivotably connected to a closing pawl.The closing pawl engages into a contour on the rotary latch and causesthe desired closing movement.

Generally, also opening aids are known that ensure that an associatedlocking mechanism of the motor vehicle door lock can be opened with theaid of a motor. An example for such an opening device or opening aid isdisclosed in DE 10 2004 052 599 A1. Again the primary objective of thisdevice is to increase the level of comfort

The known closing means or opening devices can result in problems when,for instance, a jacket, coat or similar piece of clothing or even a bodypart of the user is jammed in the gap between the closing door and themotor vehicle body. This generally causes the closing means to bedeactivated. In such a situation a user does, however, intuitivelyoperate the external door handle, expecting that the closing means isimmediately deactivated and that, at the same time, the motor vehicledoor is opened to release the jammed part. At present, no convincingsolutions are available that produce and allow this desired operation ina simple design manner.

The invention is based on the technical problem of further developingsaid actuating device in such a way that operating and safety-relatedproblems caused by the closing and opening means are avoided with littleeffort.

To solve this technical problem, a generic actuating device for jointaction upon at least two different elements of a motor vehicle door lockas disclosed in the invention is characterised in that the other of thetwo elements is a closing/opening element acting on the lockingmechanism. In other words, the two different elements of the motorvehicle door lock are, on one hand, designed as an actuating lever and,on the other hand, as a closing/opening element or element interactingtherewith, which acts on the locking mechanism.

Normally, the first element is designed as an actuating lever, whilstthe second element is a closing element. Both elements interact with thesheathed cable, containing two force transmission units for thispurpose. So as soon as a force acts upon the sheathed cable, theactuating lever and the closing element are acted upon via assignedforce transmission units.

The actuating lever is an internal actuating lever, an externalactuating lever, a main actuating lever, etc. The internal actuatinglever is regularly acted upon by the internal door handle. The externalactuating lever is, on the other hand mechanically connected to anexternal door handle for operation. The main actuating lever can beinterposed between the internal actuating lever and the externalactuating lever or can be acted upon by a motorised drive.

So as soon as the internal door handle is, in the example, activated bya user, the sheathed cable coupling the internal door lever to theinternal actuating lever, is also acted upon. The sheathed cable is thendeflected by the force. As a result, the internal actuating lever andthe closing element or the closing/opening element are acted upon.

Where the closing element in the example is thus engaging in the lockingmechanism and the internal door handle is acted upon by the user, theapplied force ensures that the internal actuating lever and the closingelement are actuated. As a result, the locking mechanism is normallyopened and a closing means is rendered ineffective by the closingelement.

To achieve this, the internal actuating lever acted upon by the internaldoor handle acts on the release lever, which in turn lifts the pawl offthe rotary latch. This is achieved as a result of a mechanical couplingof the first force transmission unit of the sheathed cable with theinternal actuating lever. As the sheathed cable interacts with theclosing element via a further second force transmission unit with a timeoverlap, the closing element is released from its engagement with thelocking mechanism. To achieve this, the closing element is, in mostcases, pivoted away from a rotary latch with which it previouslyengaged.—In most cases the described measures can, however, be observedat the external actuating lever chain, i.e. in the interaction betweenthe external door handle and the respective external actuating lever. Inthis case, the external actuating lever acts upon the release lever,whilst the sheathed cable pivots the closing element away from therotary latch.

This is particularly successful if the closing element is designed as aclosing pawl abutting the rotary latch of the locking mechanism. In mostcases, a lever and, in particular, a closing lever is assigned to theclosing pawl, acted upon by a closing drive. As soon as the rotary latchhas reached a certain specified position, in most cases the intermediateclosed position, the closing pawl engages with a respective closingcontour on the rotary latch. At the same time, the closing operation isstarted, acting upon the lever or closing lever in such a way that theclosing pawl connected to the lever moves the rotary latch from theintermediate closed position into the end position or fully closedposition. Where during this process, a piece of clothing becomes, forinstance jammed in a gap between the motor vehicle body and the closingmotor vehicle door, a manual activation of the external door handle bythe user directly ensures that the closing pawl (of the second element)is, so to speak, ejected and the motor vehicle door lock is opened.

Both operations do not necessarily have to happen at the same time andsynchronously but, instead, a time overlap suffices and the fact that,in particular, the closing pawl has left the rotary latch as soon as itmoves into its opening position (aided by the spring) once the pawl hasbeen disengaged.

To provide the two force transmission units, the sheathed cable isgenerally suspended in the first element, defining the first forcetransmission unit. The first element is generally the external actuatinglever to which the first force transmission unit is assigned. Thesecond, spaced apart element is in most cases a closing pawl. At thispoint, the sheathed cable contains a driving drum as a second forcetransmission unit.

Upon activation of the sheathed cable, the driving drum generallyinteracts with a stop on an ejection lever, acting in turn on theclosing pawl. The stop is generally an arched stop with a receivingslot. Most of the sheathed cable passes through said receiving slotbeyond the driving drum, which interacts—as described—with the stop onthe ejection lever.

So as soon as the driving drum rests against the stop and pivots theejection lever in this way, the ejection lever is able to disengage theclosing element or the closing pawl from the locking mechanism. For thispurpose, the ejection lever moves against an actuating journal of theclosing element when acted upon. As a result, the (possible) engagementof the closing element in the locking mechanism is released.

In addition to its operative connection with the core of the sheathedcable, the ejection lever can also be mechanically connected to theinternal actuating lever. The design is generally chosen in such a waythat upon its activation, the internal actuating lever acts on theejection lever for the closing element via an internal actuatingejection lever. This means that when a force is exerted on the internalactuating lever with the aid of the internal door handle, the internalactuating ejection lever is also being acted upon. The internalactuating ejection lever now acts on the ejection lever for the closingelement in a similar manner in which the sheathed cable is acted upon.This means that this operation also corresponds with the ejection leverfor the closing element mechanically separating the closing element fromthe locking mechanism via the internal actuating ejection lever.

From a topological point of view it has proven to be successful for thesecond element or the ejection lever and the (external) actuating leverto be arranged on a parallel plane in comparison to a locking mechanismplane. In contrast, the internal actuating lever and also the internalactuating ejection lever are arranged in a plane perpendicular to thelocking mechanism plane. The internal actuating ejection lever musttherefore be provided in order to convert the movement of the internalactuating lever in the plane perpendicular to the locking mechanismplane into a rotary movement in or parallel to this locking mechanismplane, with the aid of which the ejection lever assigned to the closingelement is acted upon with the desired force.

As a result, an actuating device for a motor vehicle door lock isprovided which is typically suited and designed for joint action uponthe external actuating lever at one end as well as the closing pawl of aclosing means at the other end. As soon as the sheathed cable of theactuating device is thus acted upon with a certain (pulling) force, theexternal actuating lever is deflected and the closing pawl is lifted offthe locking mechanism. This generally occurs with a time overlap, in anycase in such a way that the closing pawl is lifted mechanically off thelocking mechanism as soon as the rotary latch starts its openingmovement (with the aid of a spring).

This considerably increases the level of comfort in a simple manner. Anyincorrect functioning or safety problems, for instance during theclosing operation, can be directly and quickly terminated by a user aspart of an intuitive process by the user operating the external doorhandle. This directly interrupts the closing operation as the closingelement is disengaged from the locking mechanism by means of theejection lever. At the same time, the motor vehicle door, acted upon inthis manner, is opened as desired. All of this occurs quickly and withlittle design and installation effort, as the sheathed cable forconnecting the external door handle and the external actuating lever andthe closing pawl or the ejection lever assigned to the closing pawl onlycontains two attachment points. These attachment points or forcetransmission units can be easily provided. The second force transmissionunit or driving drum implemented at this point can already be factoryfitted to the sheathed cable so that the sheathed cable only has to beinserted in the external actuating lever during assembly in order toprovide the first force transmission unit. These are the main advantagesof the invention.

Below the invention is explained in detail with reference to a drawingshowing only one example, in which:

FIG. 1 represents a schematic overview of the actuating device of theinvention and

FIG. 2 shows a motor vehicle door lock with the actual design of theactuating means of the invention.

FIGS. 1 and 2 show an actuating device for joint action upon at leasttwo different elements 1, 2 of a motor vehicle door lock 3. For thispurpose the actuating device contains a sheathed cable 4, 5 as the mainelement. The sheathed cable 4, 5 contains a core 4 and a sheath 5.

In the embodiment, the sheathed cable 4, 5 is a Bowden cable 4, 5. Itssheath 5 is in stationary position and is supported by the motor vehicledoor lock 3. In contrast, core 4 is moveable inside the sheath 5 andcan, in particular, carry out a pulling movement from a handle 6 ontosaid elements 1, 2 of the motor vehicle door 3 as shown by the arrow inFIG. 1. In the embodiment, the handle 6 is an external door handle 6,although this is not limiting and mandatory for the invention.

The core 4 of the sheathed cable 4, 5 contains at least two forcetransmission units 7, 8 in the longitudinal extent thereof, which arespaced apart. Indeed, FIG. 1 shows a first force transmission unit 7 atthe end of the core 4 and a spaced apart second force transmission unit8 along the longitudinal extent of the core 4. The first forcetransmission unit 7 is a hook or a comparable connecting element, withthe aid of which the end of core 4 is attached to an opening of thefirst element 1. In contrast, the second force transmission unit 8 isdesigned as a driving drum 8 attached in the factory or alsosubsequently to the core 4.

The force transmission units 7, 8 spaced apart and arranged in thelongitudinal extent of the core 4 are designed to, on one hand, interactwith the first element 1 and, on the other hand, with the second element2 when the core 4 is acted upon with the aid of the handle 6. Theapplication of a force onto the core 4 actually causes the first element1 or the external actuating lever 1 of the motor vehicle door lock 3,provided at this point, to be pivoted around its axis 9 in clockwisedirection as indicated by an arrow in FIG. 1. When a force is applied tothe core 4, the second element 2 is also pivoted in clockwise directionaround its associated axis 10. In the example, the second element 2 isan ejection lever 2, assigned to a closing element 11. The closingelement 11 is mechanically connected to a closing lever 12. The closingelement 11 is indeed a closing pawl 11 pivotably mounted on the closinglever 12. The closing lever 12 is acted upon by a closing drive 14 via asheathed cable 13, only indicated in FIG. 2. Together, the closing drive14, the sheathed cable 13, the closing lever 12 and finally the closingelement or the closing pawl 11 form a closing means 11, 12, 13, 14.

As already explained, the first element 1 in the embodiment is designedas an external actuating lever 1. In principle, the first element 1 canalso be an internal actuating lever or generally an actuating lever ofthe motor vehicle door lock 3. The closing element 11 acts on a lockingmechanism 15, 16, consisting of a rotary latch 15 and a pawl 16interacting in the usual manner with the rotary latch 15. The closingelement or the closing pawl 11 engages in a contour or closing contour17 on the rotary latch 15 in order to close the locking mechanism 15,16. In this way, also a locking bolt previously retained by the lockingmechanism 15, 16 and connected to the motor vehicle door is retracted.The corresponding motor vehicle door then moves towards the motorvehicle body.

This operation is carried out with the aid of the closing means 11, 12,13, 14. In the example, the closing means 11, 12, 13, 14 or the closingdrive 14 is started when the rotary latch 15 is in its intermediatelocked position. The closing element or the closing pawl 11 can thenengage in the contour 17 on the rotary latch 15. At the same time theclosing operation 14 is started and acts on the sheathed cable 13 in thedirection of the arrow shown in FIG. 2. As a result, the closing lever12 is moved in counterclockwise direction around its axis as is alsoindicated in FIG. 2, ensuring that the closing pawl 11 engaged in thecontour 17 on the rotary latch 15, moves the rotary latch 15 in theindicated clockwise direction and from the intermediate closed positioninto the fully closed position.

If during the described closing operation a piece of clothing becomes,for instance, jammed between the motor vehicle door and the car body, auser can mechanically interrupt the closing operation by operating thehandle or the external door handle 6 and open the motor vehicle door atthe same time. In fact, the operation of the external door handle 6causes the core 4 of the sheathed cable 4, 5 f to be acted upon asindicated in FIG. 1 and also in FIG. 2. As a result, the externalactuating lever 1 pivots in clockwise direction (see FIG. 1) acting upona not expressly shown release lever, which in turn disengages the pawl16 from the rotary latch 15. A movement of the pawl 16 incounterclockwise direction around its axis and as indicated by an arrowin FIG. 2 corresponds to this.

Prior to this or at the same time, the driving drum 8 moves against astop 18 on the second element 2 or against the ejector lever 2 assignedto the closing pawl 11. The stop 18 is designed as an arched stop andalso contains a receiving slot 19. The core 4 of the sheathed cable 4, 5passes through the receiving slot 19. In fact, the core 4 passes throughthe receiving slot 19 on the other side of the driving drum 18.

As soon as the core 4 is acted upon in the direction of the shown arrowwith the aid of the external door handle 6, the driving drum 8, movingagainst the stop 18 ensures at the core 4 that the ejection lever 2 ispivoted around its axis 20—as indicated by an arrow—in clockwisedirection. This clockwise movement of the ejection lever 2 causes theclosing pawl 11 to disengage from the contour 17 at the rotary latch 15.For this purpose, the closing pawl 11 contains an actuating journal 21,against which the ejection lever 2 moves with the aid of the drivingdrum 8, when acted upon.

As a result, the closing drive 11, 12, 13, 14 and the closing element orthe closing pawl 11 is mechanically separated from the locking mechanism15, 16.

The locking mechanism 15, 16 is therefore no longer acted upon in theclosing sense. As a result, the rotary latch 15 can open with the aid ofa spring after disengagement of the pawl 16, by carrying out acounter-clockwise movement—against the direction of the closingmovement. A locking bolt previously retained by the rotary latch 15 andnot expressly shown, is released. The same applies for a motor vehicledoor, to which the locking bolt is connected.

The ejection lever 2 assigned to the closing pawl 11, is not onlymechanically connected to the external door handle 6 via the core 4 andthe sheathed cable 4, 5. Instead, the ejection lever 2 can also interactfunctionally as well as mechanically with an internal actuating lever22. The internal actuating lever 22 in turn is mechanically connected toan internal door handle—not shown in the drawings. An operation of theinternal door handle causes the internal actuating lever 22—asindicated—to pivot clockwise around its axis. This clockwise movement ofthe internal actuating lever 22 upon operation of the internal doorhandle—not shown—is transmitted by an internal actuating ejection lever23 onto the ejection lever 2 assigned to the closing pawl 11.

In fact the clockwise movement of the internal actuating lever 22corresponds to the internal actuating ejection lever 23 pivoting incounterclockwise direction as a result. This causes the internalactuating ejection lever 23 to engage with a stop edge 24 on theejection lever 2. This means that through the internal actuatingejection lever 23 the internal actuating lever 22 acts on ejection lever2 assigned to the closing pawl 11 when operated. For this purpose, theinternal actuating ejection lever 23 moves against stop 24 during itscounterclockwise movement and ensures that the ejection lever 2—as whenit is acted upon by the external door handle 6—is pivoted in clockwisedirection, disengaging the closing pawl 11 from the rotary latch 15.

It is apparent that the ejection lever 2 and the external actuatinglever 1 are arranged on a parallel plane compared to a locking mechanismplain defined by the locking mechanism 15, 16. In contrast, the internalactuating lever 22 and the internal actuating ejection lever 23 arearranged on a plane perpendicular to the locking mechanism plane. Forthis purpose, the locking mechanism 15, 16 is arranged in an L-shapedleg of an L-shaped lock case 25, whilst the internal actuating lever 22and also the internal actuating ejection lever 23 are arranged onanother L-shaped leg. The ejection lever 2 and also the externalactuating lever 1 are, on the other hand, arranged in a not expresslyshown lock cover connected with the lock case 25.

In another embodiment—not shown—the driving drum 8 can also be arrangedon the sheath 5 of the sheathed cable (4, 5).

1. Actuating device for joint action upon at least two differentelements of a motor vehicle door lock with at least one sheathed cablehaving a core and sheath, wherein the sheathed cable is provided in thelongitudinal extent thereof with at least two force transmission units,which are designed for interaction with a first element at one end andthe second element at the other end upon action on the sheathed cableand one of the two elements being designed as an actuating lever,characterised in that the other element is a closing/opening elementoperating on a locking mechanism.
 2. Device according to claim 1,characterised in that the actuating lever is one of an externalactuating lever, internal actuating lever, or main actuating lever. 3.Device according to claim 1, characterised in that the closing/openingelement is designed as a closing element and as part of a closing means.4. Device according to claim 1, characterised in that theclosing/opening element is designed as a closing pawl engaging with therotary latch of the locking mechanism.
 5. Device according to claim 4,characterised in that a closing lever, is assigned to the closing pawlacted upon by the closing drive.
 6. Device according to claim 1,characterised in that the first element is designed as an externalactuating lever and the spaced apart second element is designed as anejection lever acting on the closing/opening element.
 7. Deviceaccording to claim 1, characterised in that the core of the sheathedcable is engaged in the first element to provide the first forcetransmission unit.
 8. Device according to claim 1, characterised in thatthe core of the sheathed cable contains a driving drum as second forcetransmission unit.
 9. Device according to claim 8, characterised in thatthe driving drum interacts with a stop on the second element uponactuation of the sheathed cable.
 10. Device according to claim 9,characterised in that the stop is an arched stop with a receiving slotaccommodating the sheathed cable on the other side of the driving drum.11. Device according to claim 1, characterised in that the secondelement moves against an actuating journal of the closing/openingelement when acted upon and disengages it from the locking mechanism.12. Device according to claim 1, characterised in that the secondelement is functionally as well as mechanically connected to an internalactuating lever.
 13. Device according to claim 12, characterised in thatthe internal actuating lever acts on the ejection lever via an internalactuating ejection lever upon its activation.
 14. Device according toclaim 1, characterised in that the second element and the actuatinglever are arranged on a parallel plane in relation to the lockingmechanism plane.
 15. Device according to claim 12, characterised in thatthe internal actuating lever together with the internal actuatingejection lever are arranged in a plane perpendicular to the plane of thelocking mechanism.